Supermicro X11SDD-8C-F User Manual page 57

Data Scrambling for DDR4
Use this feature to enable or disable data scrambling support for DDR4. The options are
Auto, Disable, and Enable.
tCCD_L Relaxation
Select Auto to get TCDD settings from SPD (Serial Presence Detect) and implement into
memory RC code to improve system reliability. Select Disable for TCCD to follow Intel
POR. The options are Auto, Disable, and Enable.
tRWSR Relaxation
Select Enable to override the tRWSR timing with optimized values. Select Auto to over-
ride the tWRSR timing for Samsung DIMM memory. The options are Auto, Disable, and
Enable.
Enable ADR
Select Enable for ADR (Automatic Diagnostic Repository) support to enhance memory
performance. The options are Disable and Enable.
2X REFRESH
Use this feature to select the memory controller refresh rate to 2x refresh mode. The
options are Auto, Enable, and Disable.
Page Policy
This feature allows the user to determine the desired page mode for IMC. When Auto is
selected, the memory controller will close or open pages based on the current operation.
Closed policy closes that page after reading or writing. Adaptive is similar to open page
policy, but can be dynamically modified. The options are Auto, Closed, and Adaptive.
Memory Topology

This item displays the information of onboard memory modules as detected by the
BIOS.
 Memory RAS Configuration
Static Virtual Lockstep Mode
Select Enable to run the system's memory channels in lockstep mode to minimize
memory access latency. The options are Disable and Enable.
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Chapter 4: BIOS